Theodore jteiisojt



- GUSTAF THEODOEE NELSON,

swr-courante.

p specification of Letters' Patent.

- Patented June 3, 1919.

Application led December 23, Serial No. 267,964.

installation on any line of shaft where the line is not direct from drive to driven.

In the drawings: t Figure 1 is a side view of theimproved coupling; Figs. 2, 3 and 4 are longitudinal sections, with the parts in different positions;

Fig. 5 1s a transverse vertical section. In the present embodiment of the invention a, cylindrical block 1 is provided, having v its ends recessed as shown at 2, the said rebeing square in cross section and rounded at their bottoms. Each of the sections 3 and 4 of the transmission shaft has a head 5 and 6, respectively, the said heads being square in cross section and having their ends rounded to fit the bottoms of the recesses 2, and it will be noticed that each head tapers from near the rounded end to the shaft section. This permits lateral play in both directions, as will be evident from an inspection 0f Figs. 2 and 4.

Each head has a, transverse opening 7 and the openings of the heads taper from the center of the head toward the ends ofthe opening, gradually increasing in cross lsection toward the face of the head. A screw 8 is passed through each opening and through registering openings in the vblock 1, to connect the head to the block.

' tions,

In operation, the squared surface of the recesses and the heads will take the strain of torsion, thus relieving the strain on thel pin :or screws 8, and the tapering of the openings 7 permits the sections to take the angular movement shown in Figs.2 and 4 Without pressure on the pin or screw.

In use, the sections may extend in alinement or theyy may take a position at an obtuse angle to each other, as shown in Fig. 2. They may also be inclined in opposite direcas shown .in Fig. 4, and Whatever the position or inclinationof the shaft sections they may be made to assume a position With their long axes parallel or in alinem'ent.

I claim:

. 1. A shaft coupling comprising a block having recesses in its ends, said recesses being square in cross section and having rounded bottoms, the shaft sections having heads engaging the recesses and shaped to t the same loosely, each head being tapered toward Athe shaft section to permit angular movement of the shaft with respect to the block, and means connecting each head to the block, said means comprising pins extending transversely of the block and head, the opening in the head for' the pin increasing in cross section toward each face of the head.`

2. A shaft coupling comprising a block having recesses in its ends, said recesses being square in cross section and having rounded bottoms, the shaft sections having heads engaging the recessesand shaped to fit the same loosely, eachhead being tapered toward the shaft section to permit angular movement of the shaft Vwith respect to the block, and means connecting each head to the block.

GUsTAF THEoDoRE NELs'oN. 

